//
// Created by ashCheng on 2023/1/31.
//
#include <iostream>

int main() {
  int a = 3, b = 4, e = 5;
  decltype(a) c = a;
  decltype((b)) d = a;
  decltype(e = b) f = a;
  ++c;
  ++d;
  std::cout << "a:" << a << std::endl;
  std::cout << "b:" << b << std::endl;
  std::cout << "c:" << c << std::endl;
  std::cout << "d:" << d << std::endl;
  std::cout << "e:" << e << std::endl;
  std::cout << "f:" << f << std::endl;
  return 0;
}